Martel Electronics 135 - Manual (Page 5)

Introduction
General Description
The Model 130/135 DC/Frequency Calibrators are compact, versatile,
functionally styled calibrators. These units are menu driven so
technicians can immediately begin using them to their fullest
capabilities without extensive training.
The Model 130/135 consists of three functional areas:
At the top is an alphanumeric liquid crystal display (LCD) for
simultaneous indication of input and output readings and operator
prompting. The Model 130 uses a 2 line display while the Model 135
uses a 4 line display.
The center section is a tactile membrane keyboard for operator entry.
The lower section contains recessed input/output jacks for connecting
the supplied test leads to the device being calibrated.
There is a feature connector located at the lower end of the
instrument, below the terminals, which is used to connect external
modules to the calibrator to expand the calibrator’s capability. This
connector is also used to calibrate the Model 130/135 calibrator and as
the RS-232 interface to the Calibration System Database.
Introduction
130/135 1